polars: can it be moved to your "rtemis-extra" package?

[HenrikBengtsson]

The polars package:

• is not on CRAN (it's archived there https://cran.r-project.org/package=polars)
• is "only" available from R-Universe (https://rpolars.r-universe.dev) and GitHub (https://github.com/pola-rs/r-polars/)
• is under active development, e.g. Issue #51 and https://github.com/pola-rs/r-polars/
• is tricky to install, because it relies on Rust, for which there's yet no standard in R and CRAN. On Ubuntu 22.04, APT provides rustc 1.66.1, but polars requires rustc (>= 1.70), which means one has to go an extra mile to install Rust from non-standard sources

Because of this, the dependency on polars:

• complicates checking the package with all R dependencies including those under Suggests:
• the alternative is to set _R_CHECK_SUGGESTS_ONLY_=false when testing
• complicates checking on GitHub Actions
• makes it harder to submit to CRAN, because they check with _R_CHECK_SUGGESTS_ONLY_=true

My suggestion is to remove polars as a dependency on rtemis. If it can be incorporated via that other package where you moved other dependencies (rtemis-extra?), that would be much better.

If polars is removed, then it should be straightforward to set up package checks via GitHub Actions.

[egenn]

Agreed. My plan with packages like this has been to wait and watch their status until I start preparing for rtemis 1.0 release and CRAN submission, at which point I'd move all problematic packages to rtemis-extra. Might as well do that now, so GitHub Actions checks can get started. For now, I think I'll just comment out the polars part.